commit 190cb7dd5e14e586916da51fdecaf446697633ef
author Wei Wang <wvw@google.com> Thu Mar 08 13:33:12 2018 -0800
committer Wei Wang <wvw@google.com> Thu Mar 08 22:09:22 2018 +0000
tree 0d48c65c2ff15455cb4a17d7986769e678515eef
parent 3a7e825dc64e6903b441023d7534664b8f105c8c

atrace: only start trace when starting trace

Bug: 74396309
Test: atrace --async_stop > trace
Change-Id: I50a2bc224d6c48aa7cecf69a57b30c8ccc88b9e0

cmds/atrace/atrace.cpp

diff --git a/cmds/atrace/atrace.cpp b/cmds/atrace/atrace.cpp
index 898aa90..57745ef 100644
--- a/cmds/atrace/atrace.cpp
+++ b/cmds/atrace/atrace.cpp
@@ -1221,8 +1221,10 @@
     }
 
     bool ok = true;
-    ok &= setUpTrace();
-    ok &= startTrace();
+    if (traceStart) {
+        ok &= setUpTrace();
+        ok &= startTrace();
+    }
 
     if (ok && traceStart) {
         if (!traceStream) {